International Library of Technology · Scranton, International Textbook Co. · leaf 116
ame like that of Fig.1378 is used for the carbon, but without any such clampingdevice. The frame is stationary, and the carbon is presseddownwards through it to the commutator by means of aspring above, operating a lever arm. This type of brushholder is liable to rattle, as the carbon is not… … 3T35. A form of brush holder coming into very wideuse is what is called the reaction brush holder, illus-trated in Fig. 1379. The prin-cipal feature of this holder isthat the brush b is wedged in be-tween it and the commutator,without any support on theouter side, as in the more generalforms of…
Electrical engineering
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